Negotiations between Israel and Hamas in Qatar on a new Gaza ceasefire and hostage release deal have stalled after three days of indirect talks, a Palestinian official has told the BBC.

The official said key sticking points included how aid would be distributed during the ceasefire and Israeli troop withdrawals.

On Wednesday Donald Trump insisted there was a "very good chance" a deal would be reached either this week or next.

Israeli Prime Minister Benjamin Netanyahu, who is visiting the US, meanwhile said he wanted a deal, "but not at any price". Hamas said ongoing talks were "tough" because of Israel's "intransigence".

The choreography of meetings between Trump and Netanyahu has given the impression that the momentum towards a ceasefire deal in Gaza is growing.

On Wednesday Hamas said it had agreed to release 10 hostages as part of a deal. It said several issues, such as the flow of aid, withdrawal of Israeli forces from the Gaza Strip and guarantees for a permanent ceasefire were still being negotiated.

Meanwhile Netanyahu said he and Trump both wanted to end Hamas rule in Gaza.

"President Trump wants a deal, but not at any price. I want a deal, but not at any price. Israel has security requirements and other requirements, and we're working together to try to achieve it," he said.

Israel says 50 hostages are still in captivity, up to 20 of whom are believed to still be alive.

Earlier US special envoy Steve Witkoff earlier said they were now "down to one" unresolved issue at indirect Israel-Hamas talks in Qatar and he was hopeful of an agreement on a 60-day ceasefire by the end of this week.

However, it is unclear if much progress has so far been made during the four rounds of talks that have taken place in Doha since Sunday.

A Palestinian official with knowledge of the negotiations told the BBC on Wednesday that they remained stalled.

According to the official, the impasse is due to the Israeli delegation's refusal to allow the unrestricted entry of humanitarian aid into Gaza through UN agencies and other international organisations.

Israel was insisting on maintaining what the official described as "the current humiliating mechanism" for aid distribution - a reference to the US- and Israel-backed Gaza Humanitarian Foundation (GHF), which uses private security contractors to bypass the UN.

The source also noted that Israel continued to reject calls for the withdrawal of its forces from areas of Gaza it has occupied since 18 March - when Israel resumed its offensive, collapsing the last ceasefire - further complicating progress in the negotiations.

Qatar - which is acting as a mediator, along with the US and Egypt - also warned that more time was needed for a breakthrough.

"I don't think that I can give any timeline at the moment, but I can say right now that we will need time for this," Qatar's foreign ministry spokesman, Majed al-Ansari, said on Tuesday.

With the talks intended to provide a path to ending the 21-month war, it is little surprise that they are experiencing difficulties.

But the Trump administration appears to remain upbeat for now, with Witkoff still due to head to Doha at some point in the coming days.